public voidonRewardedAdOpened()

Called when a rewarded ad triggers a reward. The app is responsible for crediting
the user with the reward.

Parameters

reward

the reward to grant the user. This value will never be null. If the ad does not
specify a reward amount and no override is provided for this ad unit on the Admob
UI, the default reward (DEFAULT_REWARD)
will have an amount of 1 and a type of "".